elagoz elagoz
  • 02-10-2017
  • Mathematics
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How can I solve this

How can I solve this class=

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Аноним Аноним
  • 02-10-2017
4 x^2 - 32 = 8x 
-8x             -8x

4x^2 - 8x - 32  = 0 

Factor the expression ...

4 ( x+2) ( x - 4) = 0 

Set the factors equal  to 0 ...

x + 2 = 0                 x - 4 = 0
   -2    -2                    +4    +4

x = - 2    or   x = 4
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